how to insert update delete Databound textboxes.

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C#

C#4.0

data-binding

how to bind a data table column to text box( 2 way).

i am data binding columns of a data table to text boxes on a form like

textBox1.DataBindings.Add("Text", dt, "MedName");

and using currency manager for navigation like

cm = (CurrencyManager)this.BindingContext[dt];.

i am using a command builder object. I am able to populate and navigate through records.

i want add, delete, update, functionality to this form.
Can any one guide me??????